Speaker
Description
The KOTO-II detector will require several new specialized mechanical systems and we seek presently to establish the most basic aspects of their designs. Among these are dimensions and structural features for a 20 m long vacuum system utilizing 8 cylindrical chambers as large as 4 m in diameter. A vacuum window using a 4 m diameter thin elastic membrane to isolate cylindrical sections of the vacuum system has been investigated and shown to be feasible. In addition, a conceptual design has been developed for an optical interface and vacuum-feedthrough with the capacity to route hundreds of optical fiber bundles to silicon photomultiplier (SiPM) arrays. Lastly, some consideration has been given to the support structure and rail system needed for the detector as these must not only provide structural stability, but also accommodate the piecewise assembly of the detector that would be expected in a new proposed extension to the Hadron Experimental Facility at J-PARC.